Mixing systems and methods for research, industrial and medical uses

ABSTRACT

Mixing systems and methods include a mixing device comprising a primary tube having a proximal end, a distal end, an outer surface and an inner lumen and at least one secondary tube having a proximal end, a distal end, an outer surface and an inner lumen. The at least one secondary tube is substantially parallel to the primary tube. The distal end of the at least one secondary tube is fluidly connected to the primary tube at a junction located on the primary tube close to the distal end of the primary tube.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of and claims priority to U.S. patentapplication Ser. No. 12/960,375, filed Dec. 3, 2010, issued Mar. 3, 2015as U.S. Pat. No. 8,968,238, which is hereby incorporated by reference inits entirety.

FIELD

The present disclosure relates to mixing systems and methods forchemicals, fluids, medications and other materials, includingintravenous fluid delivery systems and methods.

BACKGROUND

In various industrial, laboratory and medical applications the abilityto combine different chemicals, fluids, medications and other materialsin compliance with strict sequence and timing parameters can be criticalto success. More particularly, these materials must be kept separatefrom each other at certain times and be combined at certain times to beeffective. In the construction industry, for example, careful attentionmust be paid to when water is added to cement or concrete mix so thematerial does not dry before it can be used. Wet laboratory researchalso requires that chemicals be added and removed at precise times tooptimize reactions and avoid degradation of materials.

In medical care, especially in hospital operating rooms, recovery roomsand intensive care units, it is often necessary to deliver multiplemedications, fluids and other nutrient materials concurrently topatients via intravenous (IV) infusion. These infusions may need to bekept separate, combined or changed quickly in dose and/or rate. Theefficiency with which these infusions can be altered can often haveprofound implications on their efficacy and for the safety of thepatient.

In existing IV tubing systems, dose and rate changes are accomplishedthrough the use of multiple separate sets of IV tubing connected at adistance from the patient to IV fluid/medication bags and/or infusionpumps. If multiple medications and fluids have to be administeredthrough fewer IV access points on the patient, they often are connectedvia stopcocks that allow multiple lines to be fed into a single carrierline, sometimes at a significant distance from the patient.

These existing approaches have significant drawbacks, which can lead tograve errors and inefficiencies that compromise the safety of thepatient. Multiple IV lines can cause logistical difficulties such astangled, knotted or disconnected IV lines. Caretakers' efforts toresolve these logistical complications often require multipledisconnections and re-connections of tubing, which leads to increasedrisk of infection and errors during re-connection of similar looking IVlines. The inadvertent connection of the wrong tube containing the wrongmaterials to the patient's vein can be extremely dangerous and fatal insome cases.

Another disadvantage is that there is a delay in changes made to therate of administration of the medication because existing IV tubingsystems feed the extra lines into the carrier line at a significantdistance from the patient. In addition, boluses of fluid or medicationmay accumulate in the main carrier line, leading to excessiveadministration.

Therefore, there exists a need for a simpler system that allows greatercontrol and facilitates precise mixing of chemicals, fluids, medicationsand other materials. There is also a need for a simpler and safer IVtubing system that allows administration of multiple medications andfluids without resort to multiple IV lines. There exists a need for anIV tubing system that facilitates control and precise regulation of thecombination of the different medications and fluids at a point close topatients.

SUMMARY

The present disclosure, in its many embodiments, alleviates to a greatextent the disadvantages of known mixing systems by providing a systemof coaxial tubing in a single unit having a main carrier line and one ormore administration lines that run along the outer length of the carrierline and join the main carrier line just before its distal connectionpoint. The disclosed systems and methods advantageously provide thesimplicity and efficiency of multiple lines in a single unit and theexacting control necessary to maintain different chemicals, fluids ormedications separately while facilitating mixing at a point close to thedistal end of the system.

Exemplary embodiments include a mixing device comprising a primary tubehaving a proximal end, a distal end, an outer surface and an inner lumenand at least one secondary tube having a proximal end, a distal end, anouter surface and an inner lumen. The at least one secondary tube runssubstantially parallel to the primary tube, and the distal end of the atleast one secondary tube is fluidly connected to the primary tube at ajunction. The junction may be located on the primary tube close to thedistal end of the primary tube. In exemplary embodiments, the primarytube and the at least one secondary tube have separate and distinctentry points at their proximal ends. The mixing device may comprise aback-flow prevention mechanism coupled thereto to maintainunidirectional flow of materials, and may also have a connectorapparatus attached to the distal end of the primary tube.

In exemplary embodiments, the at least one secondary tube may comprise aplurality of secondary tubes, and at least one of the plurality ofsecondary tubes may be attached to the outer surface of the primary tubeand extend longitudinally along the outer surface of the primary tube.In exemplary embodiments, at least one of the plurality of secondarytubes can peel away from the primary tube at or near the proximal end ofthe secondary tube, and the proximal end of the secondary tube comprisesa port. The mixing device may also include at least one tertiary tubehaving a proximal end and a distal end, the at least one tertiary tubebeing substantially parallel to the primary tube and the secondary tube.The distal end of the at least one tertiary tube may have a separate anddistinct exit point from an exit point of the primary tube.

In exemplary embodiments, the at least one primary tube and at least onesecondary tube are in a co-axial arrangement with one tube runningwithin the other. One or more of the primary tube and the at least onesecondary tube may be color-coded to easily distinguish the differenttubes. Further, one or more of the primary tube and the at least onesecondary tube may be made of a low absorption material for moreeffective delivery of medications that are absorbed by standard tubingmaterial or a low compliance material that allows for pressuretransduction or measurement of other physiologic parameters such asarterial blood pressure monitoring.

In exemplary embodiments, an intravenous fluid delivery system isprovided comprising at least one carrier line having a proximal end, adistal end, an outer surface and an inner lumen and at least oneadministration line having a proximal end, a distal end, an outersurface and an inner lumen. The at least one administration line runssubstantially parallel to the at least one carrier line, and the distalend of the at least one administration line is fluidly connected to theat least one carrier line at a junction. The junction may be located onthe at least one carrier line close to but spaced from the distal end ofthe at least one carrier line. In exemplary embodiments, the at leastone carrier line and the at least one administration line have separateand distinct fluid entry ports at their proximal ends.

In exemplary embodiments, the at least one administration line comprisesa plurality of administration lines. At least one of the plurality ofadministration lines may be attached to the outer surface of the atleast one carrier line and extend longitudinally along the outer surfaceof the at least one carrier line. The at least one carrier line maycomprise two or more bundled carrier lines, each carrier line having atleast one associated administration line fluidly connected thereto. Inexemplary embodiments, the distal end of the at least one secondaryadministration line may have a separate and distinct exit point from anexit point of the at least one carrier line such that a fluid travelingthrough the at least one secondary administration line does not mix witha fluid in the at least one carrier line.

The system may also include a connector apparatus attached to the distalend of the carrier line, the connector apparatus being configured toconnect the carrier line to an intravenous fluid transfer component.Exemplary embodiments may further comprise an sealing clamp or occlusionclamp coupled to the at least one administration line at or near itsdistal end. One or more of the carrier line and the at least oneadministration line may be made of a low absorption material for moreeffective delivery of medications that are absorbed by standard tubingmaterial or a low compliance material that allows for pressuretransduction or measurement of other physiologic parameters such asarterial blood pressure monitoring.

Exemplary embodiments include a clamp assembly comprising an outersheath having a proximal end, a distal end, an outer surface, an innersurface and defining an inner lumen, and an inner tube disposed withinthe inner lumen of the outer sheath and releasably coupled to the outersheath. A first actuator is located at or near the distal end of theouter sheath, and a second actuator is located at or near the proximalend of the outer sheath. The clamp assembly may also comprise aretaining clip adjacent the first actuator. The inner tube has a tophalf portion and a bottom half portion, and each of the top half portionand the bottom half portion has a proximal end, a distal end, an outersurface and an inner surface. The top and bottom half portion of theinner tube define an inner lumen of the inner tube.

In exemplary embodiments, a first protrusion is formed on the innersurface of the top half portion of the inner tube at or near the distalend of the top half portion and substantially beneath the firstactuator. Similarly, a second protrusion is formed on the inner surfaceof the bottom half portion at or near the distal end of the bottom halfportion and substantially beneath the first protrusion. A first cuttingelement is formed on the inner surface of the top half portion of theinner tube at or near the proximal end of the top half portion andsubstantially beneath the second actuator. A second cutting element isformed on the inner surface of the bottom half portion of the inner tubeat or near the proximal end of the bottom half portion and substantiallybeneath the first cutting element. When the first actuator is pressed,the first protrusion translates from an open position to a closedposition such that the first protrusion and second protrusion seal theinner lumen of the inner tube in the closed position. When the secondactuator is pressed, the first cutting element moves from an openposition to a closed position toward the second cutting element in acutting motion. In exemplary embodiments, the top half portion and abottom half portion of the inner tube comprise a linking mechanismfixedly attaching the top half portion to the bottom half portion whenthe first protrusion is in the closed position.

Exemplary embodiments include a method of mixing materials comprisingdirecting a first material through at least one main passageway suchthat the material travels in a first direction and directing a secondmaterial through at least one secondary passageway such that the secondmaterial travels in substantially the same direction as the firstmaterial. Each of the at least one main passageway and the at least onesecondary passageway has a proximal end and a distal end.

The second material is directed through a junction fluidly connectingthe at least one secondary passageway to the at least one primarypassageway such that the first material and second material are combinedat a point close to but spaced from the distal end of the at least oneprimary passageway. A third material may be directed through a tertiarypassageway such that the third material travels in substantially thesame direction as the first material and second material. The thirdmaterial may be directed through an exit point of the tertiarypassageway separate and distinct from an exit point of the mainpassageway such that the third material does not mix with the firstmaterial and second material.

Accordingly, it is seen that mixing devices are provided which allowsimpler, safer and more precise mixing of chemicals, fluids, medicationsand other materials. These and other features of the present inventionwill be appreciated from review of the following detailed description ofthe invention, along with the accompanying figures in which likereference numbers refer to like parts throughout.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing and other objects of the disclosure will be apparent uponconsideration of the following detailed description, taken inconjunction with the accompanying drawings, in which:

FIG. 1A is a perspective view of an embodiment of a mixing device inaccordance with the present disclosure;

FIG. 1B is a cross-sectional view of the mixing device of FIG. 1A;

FIG. 1C is a perspective view of a distal end of the mixing device ofFIG. 1A;

FIG. 1D is a cutaway view of a distal end of the mixing device of FIG.1A;

FIG. 1E is a perspective view of an embodiment of an intravenous fluiddelivery system in accordance with the present disclosure;

FIG. 2A is a perspective view of an embodiment of a mixing device inaccordance with the present disclosure;

FIG. 2B is a cross-sectional view of an embodiment the mixing device ofFIG. 2A;

FIG. 2C is a perspective view of a distal end of the mixing device ofFIG. 2A;

FIG. 2D is a cutaway view of a distal end of the mixing device of FIG.2A;

FIG. 2E is a perspective view of an embodiment of an intravenous fluiddelivery system in accordance with the present disclosure;

FIG. 3A is a perspective view of an embodiment of a mixing device inaccordance with the present disclosure;

FIG. 3B is a cross-sectional view of the mixing device of FIG. 3A;

FIG. 3C is a perspective view of a distal end of the mixing device ofFIG. 3A;

FIG. 3D is a cutaway view of a distal end of the mixing device of FIG.3A;

FIG. 3E is a perspective view of an embodiment of an intravenous fluiddelivery system in accordance with the present disclosure;

FIG. 4A is a perspective view of an embodiment of a mixing device inaccordance with the present disclosure;

FIG. 4B is a cross-sectional view of the mixing device of FIG. 4A;

FIG. 4C is a perspective view of a distal end of the mixing device ofFIG. 4A;

FIG. 4D is a cutaway view of a distal end of the mixing device of FIG.4A;

FIG. 4E is a perspective view of an embodiment of an intravenous fluiddelivery system in accordance with the present disclosure;

FIG. 5 is a detail cutaway view of a distal end of an embodiment of amixing device in accordance with the present disclosure;

FIG. 6 is a detail cutaway view of of a distal end of an embodiment of amixing device in accordance with the present disclosure;

FIG. 7A is a perspective view of an embodiment of a clamp assembly inaccordance with the present disclosure;

FIG. 7B is a perspective view of an embodiment of a clamp assembly inaccordance with the present disclosure;

FIG. 8A is a side cutaway view of an embodiment of clamp assembly in anopen position in accordance with the present disclosure;

FIG. 8B is a cross-sectional view of a distal end of an embodiment of aclamp assembly shown in an open position in accordance with the presentdisclosure;

FIG. 8C is a cross-sectional view of a proximal end of an embodiment ofa clamp assembly shown in an open position in accordance with thepresent disclosure;

FIG. 9A is a side cutaway view of an embodiment of clamp assembly shownin a sealing configuration in accordance with the present disclosure;

FIG. 9B is a cross-sectional view of a distal end of an embodiment of aclamp assembly shown in a sealing configuration in accordance with thepresent disclosure;

FIG. 10A is a side cutaway view of an embodiment of clamp assembly shownin a cutting configuration in accordance with the present disclosure;

FIG. 10B is a cross-sectional view of a proximal end of an embodiment ofa clamp assembly shown in a cutting configuration in accordance with thepresent disclosure;

FIG. 11A is a perspective view of a proximal end of an embodiment of amixing device in accordance with the present disclosure;

FIG. 11B is a perspective view of a proximal end of an embodiment of amixing device in accordance with the present disclosure;

FIG. 12 is a perspective view of a distal end of an embodiment of amixing device in accordance with the present disclosure;

FIG. 13A is a perspective view of a distal end of an embodiment of amixing device in accordance with the present disclosure;

FIG. 13B is a cross-sectional view of the mixing device of FIG. 13A;

FIG. 13C is a perspective view of a proximal end of the mixing device ofFIG. 13A;

FIG. 14 is a perspective view of a distal end of an embodiment of amixing device in accordance with the present disclosure;

FIG. 15A is a side cross-sectional view of an embodiment of a mixingdevice in accordance with the present disclosure;

FIG. 15B is a rear cross-sectional view of the mixing device of FIG.15A;

FIG. 16A is a side cross-sectional view of an embodiment of a mixingdevice in accordance with the present disclosure;

FIG. 16B is a rear cross-sectional view of the mixing device of FIG.16A;

FIG. 17A is a perspective view of an embodiment of an intravenous fluiddelivery system in accordance with the present disclosure;

FIG. 17B is a cross-sectional view of the intravenous fluid deliverysystem of FIG. 17A;

FIG. 18A is a perspective view of a proximal end of an embodiment of amixing device in accordance with the present disclosure;

FIG. 18B is a perspective view of a distal end of the mixing device ofFIG. 18A;

FIG. 18C-1 is a cross-sectional view of the proximal end of the mixingdevice of FIG. 18A;

FIG. 18C-2 is a cross-sectional view of the distal end of the mixingdevice of FIG. 18A;

FIG. 19A-1 is a perspective view of a proximal end of an embodiment of amixing device in accordance with the present disclosure;

FIG. 19A-2 is a perspective view of a distal end of an embodiment of amixing device in accordance with the present disclosure;

FIG. 19B-1 is a cross-sectional view of the proximal end of the mixingdevice of FIGS. 19A-1 and 19A-2;

FIG. 19B-2 is a cross-sectional view of the distal end of the mixingdevice of FIGS. 19A-1 and 19A-2;

FIG. 20A is a perspective view of an embodiment of a mixing device inaccordance with the present disclosure;

FIG. 20B is a cross-sectional view of the mixing device of FIG. 20Ataken at section 20B-20B;

FIG. 20C is a cross-sectional view of the mixing device of FIG. 20Ataken at section 20C-20C;

FIG. 20D is a perspective view of a junction point of the mixing deviceof FIG. 20A;

FIG. 20E is a cutaway view of a junction point of the mixing device ofFIG. 20A;

FIG. 21A is a perspective view of an embodiment of a mixing device inaccordance with the present disclosure;

FIG. 21B is a cross-sectional view of the mixing device of FIG. 21Ataken at section 21B-21B;

FIG. 21C is a cross-sectional view of the mixing device of FIG. 21Ataken at section 21C-21C;

FIG. 21D is a perspective view of a junction point of the mixing deviceof FIG. 21A; and

FIG. 21E is a cutaway view of a junction point of the mixing device ofFIG. 21A.

DETAILED DESCRIPTION

In the following paragraphs, embodiments will be described in detail byway of example with reference to the accompanying drawings, which arenot drawn to scale, and the illustrated components are not necessarilydrawn proportionately to one another. Throughout this description, theembodiments and examples shown should be considered as exemplars, ratherthan as limitations of the present disclosure. As used herein, the“present disclosure” refers to any one of the embodiments describedherein, and any equivalents. Furthermore, reference to various aspectsof the disclosure throughout this document does not mean that allclaimed embodiments or methods must include the referenced aspects.Reference to temperature, pressure, density and other parameters shouldbe considered as representative and illustrative of the capabilities ofexemplary embodiments, and embodiments can operate with a wide varietyof such parameters. It should be noted that the figures do not showevery piece of equipment, nor the pressures, temperatures and flow ratesof the various streams.

Exemplary embodiments of a mixing device will be described withreference to FIGS. 1A-D, 2A-D, 3A-D, 4A-D and 20A-E. Mixing device 10can be used in any application in which various materials need to becombined with precision and advantageously allows precise control overthe timing and sequence of mixing the materials. In exemplaryembodiments, a mixing device 10 includes a primary tube 12 and at leastone secondary tube 14 fluidly connected to the primary tube at ajunction 16. The primary tube 12 has a proximal end 18, a distal end 20,an outer surface 22 and defines an inner lumen 24. Similarly, thesecondary tube has a proximal end 26, a distal end 28, an outer surface30 and defines an inner lumen 32. The primary tube 12 has an entry point34, which could be any type of port for introducing fluid or materials,at its proximal end 26, and the secondary tube 14 has a distinct entrypoint 36 at its proximal end 26. The secondary tubes 14 may have a bendor kink 37 to facilitate access of materials into entry point 36.

The length, thickness and diameters of the primary and secondary tubesmay vary depending on the application, and in exemplary embodiments thediameter of the secondary tube 14 is relatively smaller than thediameter of the primary tube 12. With reference to FIGS. 18A-19B, itshould be noted that any variation of primary and secondary tubes couldbe used, and all the tubes could have substantially the same diameter.Thus, a mixing device 410 may comprise four secondary tubes 414 coupledtogether that converge into a primary tube 412 at or near the distal endof the 420 of the primary tube 412. Alternatively, the mixing device 610may comprise a single tube subdivided into four secondary tubes 614 thatconverge into an undivided primary tube 612 at or near its distal end620.

The secondary tube 14 runs substantially parallel to the primary tube12, and in most uses fluids or other materials traveling through theprimary and secondary tubes 12, 14 flow in the same direction. Thesecondary tube 14 may be attached to the outer surface 22 of the primarytube 12. As best seen in FIGS. 2B, 3B and 4B, multiple secondary tubes14 may be spaced from each other around the outer surface 22 of theprimary tube 12. In exemplary embodiments, the secondary tube 14 extendslongitudinally along the outer surface 22 of the primary tube 12, andmay be attached at one or more attachment points or have a continuousattachment along much of the length of the outer surface of the primarytube 12 and secondary tube 14.

The attachment of the primary and secondary tubes advantageously makesthe mixing device efficient and easy to use by providing a compact,uniform design with the tubes attached in a single unit. As discussed inmore detail herein, one or more secondary tubes 14 may be removablyattached to the primary tube 12 so they can be peeled away or detachedfrom the primary tube 12 and discarded after the secondary tube has beenused. The detachment of one or more secondary tubes may be facilitatedby severing the tubes using a cutting mechanism of a clamp assembly, asdiscussed in more detail herein.

As best seen in FIGS. 1D, 2D, 3D and 4D, junction 16 is located on theprimary tube 12 close to its distal end 20. In exemplary embodiments,the junction 16 provides a fluid connection between at least onesecondary tube 14 and the primary tube 12 so a fluid or other materialflowing through the secondary tube 14 combines with a different fluid ormaterial flowing through the primary tube 12. Each junction 16 is spacedslightly proximal of the distal end 20 of the primary tube 12 so thefluids or other materials from one or more secondary tubes 14 can enterthe primary tube 12 and combine with the fluid or material in theprimary tube 12 before the combined materials exit the distal end 20 ofthe primary tube 12. The junction 16 should be close enough to thedistal end 20 of the primary tube 12 to optimize or substantially reducethe amount of the time for which a change in materials, chemicals, ormedication, or a change in amount or dosage of the materials, chemicals,or medication administered by the user is reflected in the materials,chemicals, or medication exiting the distal end 20 of the primary tube12. This distance of the junction 16 from the distal end 20 of theprimary tube 12 could vary considerably depending on the particular useof the mixing device, and may be between about 1 mm and 25 cm.

As shown in FIGS. 20A-20E, a proximal portion of each secondary tube 14may extend longitudinally along the outer surface 22 of the primary tube12, and a distal portion of each secondary tube 14 may extendlongitudinally along the inner surface 23 of the primary tube 12. Moreparticularly, each secondary tube 14 extends along the outer surface 22of the primary tube 12 until it reaches a cross-through point 13, atwhich each secondary tube 14 penetrates the outer surface 22 of theprimary tube 12 and enters the inner lumen 24 of the primary tube 12.Each secondary tube 14 then extends along the inner surface 23 of theprimary tube through the inner lumen 24 from the cross-through point 13to a junction 16 near the distal end 20 of the primary tube 12. Eachsecondary tube 14 maintains a separate conduit and is fluidly connectedwith the primary tube 12 at a junction 16 located in the inner lumen 24of the primary tube 12 at or near the distal end 20 of the primary tube12. This configuration of much of the secondary tubes 14 within theprimary tube 12 advantageously provides a more streamlined and compactdesign.

In exemplary embodiments shown in FIGS. 21A-21E, a portion of eachsecondary tube 14 may extend within the wall 11 of the primary tube 12.More particularly, each secondary tube 14 extends along the outersurface 22 of the primary tube 12 until it reaches a cross-through point13, at which each secondary tube 14 penetrates the outer surface 22 ofthe primary tube 12 and enters the wall 11 of the primary tube 12. Eachsecondary tube 14 then extends through the wall 11 of the primary tubefrom the cross-through point 13 to the distal end 20 of the primary tube12. Each secondary tube 14 is fluidly connected with the inner lumen 24of the primary tube 12 at a junction 16 located at or near the distalend 20 of the primary tube 12. This configuration of much of thesecondary tubes 14 within the wall 11 of the primary tube 12advantageously provides a more streamlined and compact design whileallowing the full inner lumen 24 of the primary tube 12 to remain openfor flow of a primary material, chemical or medication 45.

This controlled convergence of fluids from one or more secondary tubesto a primary tube near the distal end of the primary tube advantageouslyprovides the ability to transport multiple different materialsindividually, then mix them with precise volumes and timing and finallytransport the combined materials together out of the distal end 20 ofthe primary tube 12. The distal end 20 of the primary tube 12 could haveany kind of connector apparatus attached thereto to fluidly connect theprimary tube 12 to other tubing, industrial or scientific apparatus orintravenous delivery tubing or apparatus for delivering medication tohuman beings or animals undergoing medical care.

Referring to FIGS. 5 and 6, exemplary embodiments of a mixing device 10may comprise additional components to regulate and control the flow ofmaterials from the secondary tubes 14 to the primary tube 12. Forexample, one or more of the secondary tubes 14 could be equipped with amechanism to prevent back-flow of the fluid or material from the primarytube 12 into the secondary tube 14. Such a back-flow mechanism 38 may becoupled to the secondary tube 14 at its distal end 20 at or nearjunction 16. The back-flow mechanism 38 could employ any variety ofclamp, one-way check valve 38 a, ball valve 38 b, or any other devicethat would regulate material flow and prevent material from leakingbackwards from the primary tube 12 to a secondary tube 14. The back-flowmechanism 38 could be located at other points along the secondary tube14 if desired, such as halfway along the length of the secondary tube 14or at or near its proximal end 26. Similarly, as discussed in moredetail herein, the mixing device 10 could have an occlusion clamp 500coupled to the secondary tube 14 to seal the tube and prevent materialfrom passing through junction 16 to primary tube 12.

With reference to FIGS. 7A-10B, exemplary embodiments of a sealingclamp, or occlusion clamp, will now be described. An exemplaryembodiment of a clamp assembly 500 has a co-axial dual tube structure soit can be threaded over a primary, secondary or tertiary tube, asdescribed in more detail herein. More particularly, the clamp assembly500 may comprise an outer sheath 502 that has a proximal end 504, adistal end 506, an outer surface 508, an inner surface 509 and definesan inner lumen 510, and an inner tube 518 disposed within the innerlumen 510 of the outer sheath 502.

In exemplary embodiments, the inner tube 518 is a cylinder formed of atop half portion 524 and a bottom half portion 526. The top and bottomhalf portions 524, 526 are corresponding components, and each has aproximal end 527, a distal end 530, an outer surface 532 and an innersurface 534. Together, the top and bottom half portions 524, 526 definean inner lumen 536 of the inner tube 518. The top and bottom halfportions 524, 526 are unconnected when in an open position and connectedby connection portions 528 a, 528 b on either side of the inner tube 518when in a closed position and the secondary tube 514 is cut andpermanently sealed. The connection portions 528 a, 528 b may be composedof any type of connection mechanism that can fixedly attach the top andbottom half portions 524, 526 of the inner tube 518. In exemplaryembodiments, each connection portion 528 a, 528 b comprises a maleconnecting portion 529 that may be integrally formed with the top halfportion 524 of the inner tube 518 and a female connecting portion 531defined by an end of the bottom half portion 524 of the inner tube 518.As described in more detail herein, the male and female connectingportions 529, 531 form a snap-fit to connect the top and bottom halfportions 524, 526 of the inner tube 518 when in a closed position andthe secondary tube 514 is cut and permanently sealed.

The inner tube 518 may be releasably coupled to the outer sheath 502 bya linking mechanism 503. The linking mechanism 503 may be anything thatmaintains a temporary attachment between the inner surface 509 of theouter sheath 502 and the outer surface 532 of the inner tube 518 suchthat the attachment can be easily broken by minimal force to manuallyseparate the outer sheath 502 from the inner tube 518. In exemplaryembodiments, linking mechanism 503 comprises a plurality of thin sheetsof material such as plastic that maintain the temporary attachmentbetween the inner surface 509 of the outer sheath 502 and the outersurface 532 of the inner tube 518 but sever easily.

A first actuator 520 may be located at or near the distal end 506 of theouter sheath 502, and a second actuator 522 may be located at or nearthe proximal end 504 of the sheath. In exemplary embodiments, theactuators 520, 522 are buttons or other mechanisms that may be easilydepressed by the user. The outer sheath 502 may define one or moreapertures 514, 516 to house the actuators. More particularly, the firstactuator 520 may be partially disposed in a first aperture 514 locatedat or near the distal end 506 of the outer sheath 502 and the secondactuator 522 may be partially disposed in a second aperture 516 locatedat or near the proximal end 504 of the outer sheath. It should be notedthat the locations of the actuators 520, 522 could be located anywherealong the outer sheath 502 of the clamp assembly as long as one of theactuators engages the temporary clamping mechanism 537 and the otherengages the cutting mechanism 542.

As best seen in FIG. 9A-B, the clamp assembly 500 includes a temporaryclamping mechanism 537 that can be used to block flow of materialsthrough the primary, secondary or tertiary tubes 12, 112, 212, 14, 114,214, 40. More particularly, a first protrusion 538 is formed on theinner surface 534 of the top half portion 524 of the inner tube 518. Thefirst protrusion 538 may be located at any location along the top halfportion 524 of the inner tube 518, at or near the proximal end 528, ator near the distal end 530 or in a central region of the top halfportion 524. In exemplary embodiments, the first protrusion 528 islocated toward the distal end 530 of the top half portion 524, and couldbe at the distal end 530 or displaced from the distal end, so long asthe first protrusion 538 is substantially beneath the first actuator 520such that pressing the first actuator exerts a downward force on thefirst protrusion 538.

In exemplary embodiments, a second protrusion 540 is formed on the innersurface 534 of the bottom half portion 526 of the inner tube 518 towardthe distal end of the bottom half portion 526. As with the firstprotrusion 538, the location of the second protrusion 540 on the bottomhalf portion 526 may vary. However, the second protrusion 540 should besubstantially beneath the first protrusion 538 such that depressing thefirst actuator 520 and the first protrusion 538 causes the firstprotrusion to contact the second protrusion 540 so the two protrusions538, 540 seal the inner lumen 536 of the inner tube 518. The first andsecond protrusions 538, 540 may be fixedly attached to or integrallyformed with the top and bottom half portions 524, 526, respectively. Thefirst actuator 520 may have an intermediate depressed position in whichit is pressed down partially and the two protrusions 538, 540 form atemporary seal of the inner lumen 536. In a second, fully depressedposition, the first actuator 520 is pressed down completely and the topand bottom half portions 524, 526 become locked.

In exemplary embodiments, the clamp assembly 500 comprises a cuttingmechanism 542 at or near the proximal end 527 of the inner tube 518. Asdiscussed in more detail herein, the cutting mechanism 542 allows theuser to permanently sever a primary, secondary or tertiary tube 12, 112,212, 14, 114, 214, 40 after use. As best seen in FIGS. 10A-B, exemplaryembodiments of a cutting mechanism include a first cutting element 544formed on the inner surface 534 of the top half portion 524 of the innertube 518 and a second cutting element 546 formed on the inner surface534 of the bottom half portion 526 of the inner tube. The cuttingelements 544, 546 may be separate components fixedly attached to theinner tube 518 or integrally formed with the inner tube. The cuttingelements may be blades made of metallic material or sharpened plasticmaterials and may be smooth or serrated.

The first cutting element 544 is located substantially beneath thesecond actuator 522 such that depressing the second actuator exerts adownward force on the first cutting element 544. The second cuttingelement 546 is located substantially beneath the first cutting element544 so that depressing the second actuator 522 and the resultingdownward cutting motion of the first cutting element 544 causes it tocontact the second cutting element 546. If the clamp assembly 500 ismounted on a primary, secondary or tertiary tube, then the cuttingelements 544, 546 would contact that tube, and this action would serveto cut a portion of primary, secondary or tertiary tube, as described inmore detail herein. It should be noted that the cutting elements 544,546 could be located at any portion of the inner tube 518 so long asthey are substantially beneath one of the actuators 520, 522.

Exemplary embodiments of a clamp assembly 500 may further comprise aretaining clip 548 to hold the first actuator 520 down and lock it in adepressed position. The retaining clip 548 is located adjacent the firstactuator 520 either proximal, distal or to the side of the firstactuator 520. In exemplary embodiments, the retaining clip 548 islocated just distal of the first actuator 520. As described in moredetail herein, when the first actuator 520 is in a partially depressedposition, the retaining clip 548 may be slid proximally to engage thefirst actuator 520 and hold its downward force on the first protrusion538 to maintain the temporary seal of the inner lumen 536 of the innertube 518 and thereby block flow of materials through one of the primary,secondary or tertiary tubes. The retaining clip 548 may be slid distallyto disengage it from the first actuator 520 so the first actuator israised and the inner lumen 536 is unsealed.

Referring to FIGS. 11A-B, the secondary tubes 14 of mixing device 10 maybe detachable so the user can peel them away after use. Turning to FIG.12, it can be seen that an exemplary embodiment of a mixing device 10may include at least one tertiary tube 40 that has a separate exit point42 instead of a fluid connection with the primary tube 12 Like secondarytubes 14, tertiary tube 40 has a proximal end 44, a distal end 46, andouter surface 48 and defines an inner lumen 50. Tertiary tube 40 runssubstantially parallel to the primary tube 12 and one or more secondarytubes 14. However, instead of its distal end 46 fluidly connecting tothe primary tube 12 at a junction, tertiary tube 40 has its own separateand distinct exit point 42. This advantageously provides flexibility tothe user so mixing device can be used in applications where certainfluids or materials need to be combined while other materials need toremain separate from the combined materials. In addition, the tertiarytube 40 could be detachable and peel away, as discussed in more detailwith respect to intravenous fluid delivery system embodiments.

As shown in FIGS. 13A-13C, exemplary embodiments of a mixing device 110may have multiple primary tubes 112 a, 112 b running in parallel, witheach primary tube 112 a, 112 b having one or more associated secondarytubes 114 a-114 c running substantially parallel to a respective primarytube 112 a, 112 b. Each primary tube 112 a, 112 b has a proximal end118, a distal end 120, an outer surface 122 and defines an inner lumen124. Each secondary tube is similarly configured with a proximal end126, a distal end 128, an outer surface 130 and an inner lumen 132. Inan exemplary embodiment, the outer surfaces 122 a, 122 b of the twoprimary tubes 112 a, 112 b are attached, either continuously or atmultiple attachment points, and extend longitudinally in parallelconfiguration. As best seen in FIGS. 13A-13C, the primary tubes 112 a,112 b could be configured to split apart at any point along theirlength, particularly at a point closer to the distal ends 128, and couldalso be releasably attached so they can be easily peeled away from eachother. The primary tube 112 has one or more entry points 134, whichcould be any type of port for introducing fluid or materials, at or nearits proximal end 126, and the secondary tube 114 has a distinct entrypoint 36 at its proximal end 126.

In exemplary embodiments, secondary tubes 114 a, 114 b, 114 c may beattached to the outer surface 122 of the primary tube 112 a, andsecondary tubes 114 d, 114 e and 114 f are attached to the outer surfaceof primary tube 112 b. The secondary tubes 114 a-f extend longitudinallyalong the outer surface 22 of the primary tube 112 a, 112 b and may beattached at one or more attachment points or have a continuousattachment along much of the length of the outer surface each respectiveprimary tube 112 and secondary tube 114. One or more secondary tubes 114may be removably attached to the primary tube 112 so they can be peeledaway or detached from the primary tube 112 and discarded after thesecondary tube has been used. Backflow prevention clamps or valves,sealing clamps or occlusion clamps could also be provided. Each primarytube 112 a, 112 b has a junction 116 close to its distal end 120 toprovide a fluid connection between at least one secondary tube 114 andthe primary tube 112 a, 112 b. The secondary tubes 114 could be colorcoded with the different colors 115 a-115 d (represented by differentpatterns in the figures) indicating different fluids or medications sothe user can associate each secondary tube 114 with the particularchemical, medication or other material in that tube.

Referring to FIG. 14, embodiments of a mixing device 310 may compriseone or more secondary tubes 314 made of a different material than theother secondary tube 314. For example, a secondary tube 314 c may bemade of low absorption material to minimize absorption of the fluid ormedication running through the tube 314 c. The secondary tube 314 c mayalso be composed of low compliance tubing to allow for pressuretransduction, i.e., arterial blood pressure monitoring, or measurementof other physiologic parameters such as arterial blood pressuremonitoring.

In exemplary embodiments, the mixing device 210 may be configured in aco-axial arrangement. As shown in FIGS. 15A-16B, the primary tube 212 isan inner tube surrounded by one or more secondary tubes 214 such thatthe inner lumen 232 of the first secondary tube 214 a is defined by theouter surface 222 of the primary tube 212 and the inner surface 249 ofthe first secondary tube 214 a. The secondary tube 214 a extendslongitudinally along the outer surface 222 of the primary tube 212, andmay be integrally formed with the primary tube 212. Exemplaryembodiments may further comprise another secondary tube 214 bsurrounding the first secondary tube 214 a such that the inner lumen 233of the second secondary tube 214 b is defined by the outer surface 231of the first secondary tube 214 a and the inner surface 251 of thesecondary tube 214 b. It should be understood that a co-axial mixingdevice 210 could include additional secondary tubes surroundingsecondary tube 214 b. One or more junctions 216 a-b are located close tothe distal end 220 of the primary tube 212 to provide a fluid connectionbetween secondary tube 214 a and the primary tube 212 and junction 216 bprovides a fluid connection between secondary tube 214 b so a fluid orother material flowing through the secondary tubes 214 a, 214 b combineswith a different fluid or material flowing through the primary tube 212before the combined materials exit the distal end 220 of the primarytube 212. As discussed above, additional components to regulate andcontrol the flow of materials from the secondary tubes 214 to theprimary tube 212, such as back-flow clamps or valves, or occlusionclamps, may be provided.

In operation, the user introduces a first desired fluid, chemical orother material 45 into the mixing device 10 through entry point 34 ofthe primary tube 12. One or more secondary or tertiary materials 47, 49are introduced into entry point 36 of the secondary tube 14. Thesecondary or tertiary materials 47, 49 could be introduced into thesecondary tubes 14 at about the same time as the primary material 45 isintroduced into the primary tube 12 or at different times. The timingdepends on the particular purpose of the user, the nature of theapplication and the types of materials being used.

The first material 45 travels through the inner lumen 24 of the primarytube 12 from its proximal end 18 to its distal end 20. Concurrently orat a later time, the second material 46 travels through the inner lumen32 of the secondary tube 14 from its proximal end 26 to its distal end28. In exemplary embodiments, the user may maintains occlusion clamp 500in a sealed position to prevent one or more of the secondary or tertiarymaterials 47, 49 in the secondary tubes 14 from mixing with the firstmaterial 45 in the primary tube. At the desired time for combining thesecondary and/or tertiary materials 47, 49 with the primary material 44,the user opens the occlusion clamp 500 of one or more secondary tubes14. This permits the secondary and/or tertiary materials 47, 47 toresume flow through junction 16 into the primary tube 12 and combinewith the first material 45.

The user then may direct the combined materials through the distal end20 of the primary tube 12 via a connector apparatus to other tubing,industrial, medical or scientific apparatus. When using embodiments ofthe invention having a tertiary tube 40, the user may direct a tertiarymaterial 49 through the tertiary tube 40 and out the separate exit point42. The user may also peel away and detach the tertiary tube 40 aftercompleting the transfer of tertiary material 48 through it.

One or more clamp assemblies 500 may be used in conjunction with one ormore of the tubes during operation to allow for temporary or permanentblocking of the flow of materials or to facilitate severance of one ormore of the tubes. As discussed with reference to FIG. 7A-10C, anexemplary embodiment of a clamp assembly 500 may be threaded onto asecondary tube 14. If it is desired to temporarily seal the secondarytube 14, the user depresses the first actuator 520, which forces thefirst protrusion 538 downward and squeezes the secondary tube 14 betweenthe first and second protrusion 538, 540, thereby sealing the secondarytube 14 and blocking the flow of material therein. The user maypartially depress the first actuator 520 and hold it manually totemporarily block flow. Alternatively, the user may partially depressthe first actuator 520 and slide the retaining clip 548 proximally so itengages the first actuator 520 and holds the first actuator 520 in thepartially depressed position. To unseal the secondary tube 14 andrestore the flow of materials therethrough, the user either releases thefirst actuator 520 directly or slides the retaining clip 548 distally todisengage it from the first actuator 520 and allow the first actuator520 to rise from the partially depressed position.

If it is desired to permanently seal the secondary tube 14, the userpresses the first actuator 520 to its fully depressed position. Thisaction forces the first protrusion 538 downward and squeezes thesecondary tube 14 between the first and second protrusion 538, 540,thereby sealing the secondary tube 14 to block the flow of materialtherein. This action also causes the top and bottom half portions 524,526 to lock via the snap-fit engagement of male connecting portions 529with female connecting portions 531 and stay in a compressed position.

If the user has finished using one or more of the primary, secondary ortertiary tubes in operation of the mixing device, a portion of a tubemay be permanently severed using the clamp assembly 500. To cutsecondary tube 14, the user depresses the second actuator 522, whichcauses a downward force on the first cutting element 544. The firstcutting element 544 moves in a downward cutting motion toward the secondcutting element 546 and the two cutting elements sever the secondarytube 14. The severed portion of the secondary tube 14 can then bediscarded. The user may separate the outer sheath 502 from the innertube 518 of the clamp 500 by sliding the outer sheath 502 in a proximaldirection off the inner tube 518 and sliding the inner tube 518 in adistal direction. The sliding force causes linking mechanisms 503 tobreak, thereby decoupling the outer surface 532 of the inner tube 518from the inner surface 509 of the outer sheath 502. The inner tube 518of the occlusion clamp 500 remains coupled to the secondary tube 14 ascutting mechanism 542 of the occlusion clamp 500 will remain in a closedposition to permanently seal the primary, secondary or tertiary tube atthe severed end so the used tube can be discarded cleanly and safelywithout leakage of chemicals or other hazardous materials.

Referring now to FIGS. 1E, 2E, 3E, 4E and 17A-B, exemplary embodimentsof a mixing device for use in intravenous (IV) fluid deliveryapplications will be described. An exemplary embodiment of anintravenous fluid delivery system 310 comprises at least one carrierline 312 and at least one administration line 314 fluidly connected tothe primary tube at a junction 316. The carrier line 312 has a proximalend 318, a distal end 320, an outer surface 322 and defines an innerlumen 324. Similarly, the administration line 314 has a proximal end326, a distal end 328, an outer surface 330 and defines an inner lumen332. The carrier line 312 has an entry point 334, which could be anytype of port suitable for introducing IV carrier fluids, nutrientfluids, medications or anesthetic agents, at its proximal end 326. Inexemplary embodiments, there is a female Luer lock connector 331 tofacilitate injection of fluids or medication into the carrier line. Eachadministration line 314 has a distinct entry point 336 at its proximalend 326 and may also include a Luer lock connector 331.

The administration line 314 runs substantially parallel to the carrierline 312, and in most medical uses fluids or medications travelingthrough the carrier and administration lines 312, 314 flow in the samedirection. The secondary tube 314 may be attached to the outer surface322 of the primary tube 312. In exemplary embodiments, theadministration line 314 extends longitudinally along the outer surface318 of the carrier line 312, and may be attached at one or moreattachment points or have a continuous attachment along much of thelength of the outer surface of the carrier line 312 and administration314. One or more of the administration lines 314 may have a bend or kink337 to facilitate access of materials into entry point 336. In addition,one or more of the administration lines 314 may be removably attached tothe carrier line 312 so they can be peeled away or detached from thecarrier line 312 and discarded after one or more of the administrationlines 314 have been used.

In exemplary embodiments, IV fluid delivery system has a junction 316 ator near the distal end 320 of the carrier line 312. The junction 316provides a fluid connection between at least one administration line 314and the carrier line 312 so a second IV fluid or medication that flowsthrough the administration line 314 mixes with a first IV fluid ormedication that flows through the carrier line 312. Each junction 316 isspaced slightly proximal of the distal end 320 of the carrier line 312so the fluids or medications from one or more administration lines 314can enter the carrier line 312 and combine with the carrier fluid in thecarrier line 312 immediately before the combined materials exit thedistal end 320 of the carrier line 312. The distal end of the carrierline 312 may be fitted with a male Luer lock connector 333 to facilitatea connection to an IV tube 339 entering the patient 340.

As discussed with reference to FIGS. 5-6, mechanisms to preventback-flow of the carrier fluid or other material from the carrier lineinto the administration lines may be provided. The IV delivery system310 could also include an occlusion clamp 500. In exemplary embodiments,the occlusion clamp 500 is coupled to the secondary tube 314 to seal thetube and stop the flow of IV fluids or medications from passing throughjunction 316 to the carrier line 312. Embodiments of an occlusion clamp500 are described in detail above in connection with FIGS. 7A-10C, sowill not be comprehensively described again here.

It should be noted that each and every embodiment and variation of amixing device described above could be used in conjunction with an IVdelivery system and some embodiments may be particularly advantageous inIV applications. For instance, as discussed with reference to FIG. 12,one or more of the administration lines could have a separate anddistinct exit point instead of a fluid connection with the carrier lineand could be detachable so the medical practitioner could peel it awayand discard the administration line after use. This advantageouslyprovides flexibility to the medical practitioner in applications wherecertain IV fluids or medications need to be combined while other IVmaterials need to remain separate from the combined fluids ormedications.

In addition, an IV delivery system may comprise multiple carrier linesrunning in parallel, each having one or more associated administrationlines running substantially parallel to a respective carrier line. Asbest seen in FIGS. 13A-13C, the carrier lines could be configured tosplit apart at any point along their length, particularly at a pointcloser to the distal ends, and could also be releasably attached so themedical practitioner can easily peel the carrier lines away from eachother. The administration lines could be color coded with the differentcolors (represented by different patterns in the figures) indicatingdifferent IV fluids or medications. As shown in FIG. 14, one of theadministration lines could be made of a different material than theother administration lines such as a low absorption material for moreeffective delivery of medications that are absorbed by standard tubingmaterial or low-compliance tubing to allow for pressure transduction ormeasurement of other physiologic parameters such as arterial bloodpressure monitoring. Referring again to FIGS. 15A-16B, an IV deliverysystem could also have a co-axial configuration such that the carrierline is an inner tube surrounded by one or more administration lines.

In operation, the medical practitioner introduces carrier fluid 339 intothe carrier line 312 through female Luer lock connector 331 so thecarrier fluid 337 flows through the inner lumen 324 of the carrier line312 and into the patient 340. At any time before it is necessary toadminister additional IV fluids or IV medication 335, the medicalpractitioner introduces one or more of such fluids or medications into arespective administration line 314. Backflow prevention mechanisms 338may be used to ensure that the carrier fluid 337 does not flow backwardsinto any of the administration lines 314.

The medical practitioner may employ an occlusion clamp 500 by threadingit onto one or more of the administration lines 314 to a desiredlocation on the administration line 314 so the administration line runsthrough the inner lumen 536 of inner tube 518. To prevent the flow of IVfluid or medication 335 from the administration line 314 into thecarrier line 312, the medical practitioner uses the temporary clampingmechanism 537 by pressing the first actuator 520 down into anintermediate position. This causes the first protrusion 538 to movedownward and squeeze a portion of the administration line 314 betweenthe first and second protrusions 538, 540, thereby temporarily sealingthe administration line 314. The medical practitioner may slide theretaining clip 548 in a proximal direction to hold down the firstactuator 520 and maintain the seal.

When the medical practitioner is ready to administer the IV fluid ormedication 335 in the administration line 314, he or she either manuallyreleases the first actuator 520 or slides the retaining clip 548 in adistal direction to disengage it from the first actuator. This causesthe first protrusion 538 to rise and unseals the administration line 314to restore flow of the IV fluid or medication 335. The IV fluid ormedication 335 then flows distally through the inner lumen 332 of theadministration line 314 and through junction 316 into the carrier line312. There the IV fluid or medication 335 mixes with the carrier fluid337 flowing through the inner lumen 324 of the carrier line 312. Thecombined carrier fluid 337 and IV fluid or medication 335 then exit thedistal end 320 of the carrier line 312 through male Luer lock connector333 and flows into the patient 340.

If using a peel away embodiment, the medical practitioner may thensimply peel away the used administration line 314 after the IV fluid ormedication 335 has been administered. Alternatively, the medicalpractitioner could sever the used administration line 314 using thecutting mechanism cutting mechanism 542 of the occlusion clamp 500. Thiscan be accomplished by depressing the second actuator 522, which causescutting element 544 to move downward toward cutting element 546, therebycutting through the portion of the administration line 314. The medicalpractitioner can sever at any point along the administration line 314 bysliding the occlusion clamp 500 along the line to the desired point andthen depressing the second actuator 522 when the desired point isreached. This advantageously allows the medical practitioner theflexibility cut or peel away all of the used administration line 314 orjust a portion of it. The cutting mechanism 542 of the occlusion clamp500 will remain in a closed position to permanently seal theadministration line 314 at the severed end so the used administrationline 314 can be discarded cleanly and safely without leakage of fluidsor medication.

It will be apparent to those skilled in the art that the selectiveseparation and attachment points of the carrier line and theadministration lines makes the IV delivery system particularlyadvantageous for medical uses. The system is both efficient and easy touse due to its a compact, integrated design with the tubes attached in asingle unit, and with selective flow control and administration linepeel away capability. The system provides an IV fluid and medicationdelivery system that is safe during use and safe to clean up.

Thus, it is seen that mixing systems and methods for research,industrial and medical uses are provided. It should be understood thatany of the foregoing configurations and specialized components orchemical compounds may be interchangeably used with any of the systemsof the preceding embodiments. Although illustrative embodiments of thepresent invention are described hereinabove, it will be evident to oneskilled in the art that various changes and modifications may be madetherein without departing from the invention. It is intended in theappended claims to cover all such changes and modifications that fallwithin the true spirit and scope of the invention.

What is claimed is:
 1. A mixing device comprising: a primary tube havinga proximal end, a distal end, an outer surface and defining an innerlumen; at least one secondary tube having a proximal end, a distal end,an outer surface and defining an inner lumen, the at least one secondarytube being substantially parallel to the primary tube; the distal end ofthe at least one secondary tube being fluidly connected to the primarytube at a junction, the junction being located close to the distal endof the primary tube.
 2. The mixing device of claim 1 wherein the primarytube and the at least one secondary tube have separate and distinctentry points at their proximal ends.
 3. The mixing device of claim 1further comprising a back-flow prevention mechanism coupled to themixing device.
 4. The mixing device of claim 1 further comprising aconnector apparatus attached to the distal end of the primary tube. 5.The mixing device of claim 1 wherein the at least one primary tube andat least one secondary tube are in a co-axial arrangement.
 6. The mixingdevice of claim 1 wherein the at least one secondary tube comprises aplurality of secondary tubes.
 7. The mixing device of claim 6 wherein atleast one of the plurality of secondary tubes is attached to the outersurface of the primary tube and extends longitudinally along the outersurface of the primary tube.
 8. The mixing device of claim 7 wherein atleast one of the plurality of secondary tubes peels away from theprimary tube at or near the proximal end of the secondary tube.
 9. Themixing device of claim 1 further comprising at least one tertiary tubehaving a proximal end and a distal end, the at least one tertiary tubebeing substantially parallel to the primary tube and the secondary tube;the distal end of the at least one tertiary tube having a separate anddistinct exit point from an exit point of the primary tube.
 10. Themixing device of claim 1 wherein one or more of the primary tube and theat least one secondary tube is color-coded.
 11. The mixing device ofclaim 1 further comprising a sealing clamp coupled to one or more of theprimary tube and the at least one secondary tube.
 12. An intravenousfluid delivery system, comprising: at least one carrier line having aproximal end, a distal end, an outer surface and defining an innerlumen; at least one administration line having a proximal end, a distalend, an outer surface and defining an inner lumen, the at least oneadministration line being substantially parallel to the at least onecarrier line; the distal end of the at least one administration linebeing fluidly connected to the at least one carrier line at a junction,the junction being located close to the distal end of the at least onecarrier line.
 13. The system of claim 12 wherein the at least onecarrier line and the at least one administration line have separate anddistinct fluid entry ports at their proximal ends.
 14. The system ofclaim 12 wherein the at least one administration line comprises aplurality of administration lines.
 15. The system of claim 14 wherein atleast one of the plurality of administration lines is attached to theouter surface of the at least one carrier line and extendslongitudinally along the outer surface of the at least one carrier line.16. The system of claim 12 further comprising a connector apparatusattached to the distal end of the carrier line, the connector apparatusbeing configured to connect the carrier line to an intravenous fluidtransfer component.
 17. The system of claim 12 further comprising atleast one secondary administration line having a proximal end, a distalend, an outer surface and an inner lumen, the at least one secondaryadministration line being substantially parallel to the at least onecarrier line; the distal end of the at least one secondaryadministration line having a separate and distinct exit point from anexit point of the at least one carrier line such that a fluid travelingthrough the at least one secondary administration line does not mix witha fluid in the at least one carrier line.
 18. The system of claim 12wherein the at least one carrier line comprises two or more bundledcarrier lines, each carrier line having at least one associatedadministration line fluidly connected thereto.
 19. The system of claim12 further comprising an occlusion clamp assembly coupled to one or moreof the at least one carrier line and the at least on administrationline.
 20. The system of claim 12 wherein one or more of the carrier lineand the at least one administration line is made of a low absorptionmaterial.